Seraphs were first created by humans trying to defy the natural order of the universe and resurrect the dead. You have become one such individual who was resurrected from the dead, thus becoming something greater than human. An abnormal existence that defies the natural order of the universe, harboring an angel within yourself.
While you still possess your normal appearance despite playing host to a divine being within your body and soul, you are anything but normal. Every ability you have is bolstered by the presence of the angel, giving you strength above what you would normally have. A human could go from being average to destroying a city with ease. You also gain a supernatural regeneration that keeps you alive as long as the angel is. The angel cannot be killed by normal means. It also takes more for you to be injured, as your durability has been altered to be equal to the amount of strength that you possess. You possess another form that you can transform into; this transformation only happens under great duress at the start. However, as time goes by and you gain more control over your power, you can access this form whenever you wish.
When in this form, your eyes turn pitch black with golden irises, as well as gaining six wings made of your own blood that has turned into a pitch-black, tar-like substance That allows for flight at around twice the speed you can normally go on land; additionally, your physical and other abnormal abilities are tremendously enhanced, to the point that you could, with your bare hands, shake an entire island and, with a sword, cut it in half. Your speed and durability have also increased to similar heights. Your regeneration has also been bolstered so that you can regenerate from a single cell in under a second, whereas before it would take at least a month.
Additionally, each seraph gains access to a unique abnormal ability. This usually comes in the form of abilities similar to the seven trumpets mentioned in the Book of revelation. However, this is not a limitation that you have; your ability can be anything that suits your personality. This also comes with the ability to turn both living and non-living things into salt with a wave of your hand.
The seraph that has entered your body is sentient and will take control when you are unconscious; however, the personality and form they take are best suited to your personality and are loyal to you.